ITEM NAME:5pieces 5V Micro USB 1A 18650 Lithium Battery Charging Board Charger Module Good Descriptio n Description: Descriptions: Input port with micro 5pin USB female, can directly use mobile charger for input to the lithium battery,and still retain the input voltage wiring solder joints, can be very convenient. Connect the battery to B + B - , insert mobile phone charger to the USB Female then red light is charging and green is full of charged. Specifications: The input voltage: 5V Maximum charging current: 1000 mA Charge cut-off voltage: 4.2 V + / - 1% The battery overcharge protection voltage: 2.5 V Battery over-current protection current: 3 A Input interface: MINI USB Size:2.6 x 1.7 cm Package Included: Package Included: 5x 5V Micro USB 1A 18650 Lithium Battery Charging Board Charger Module+Protection Whatever the ending's perfect or not, you can't disappear from my world 5pieces 5V Micro USB 1A 18650 Lithium Battery Charging Board Charger Module Good.Input interface: MINI USB. Maximum charging current: 1000 mA. Battery over-current protection current: 3 A. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.